About OCP operating current of EN5322QI

[KSuzuki]

Hello,

Please tell me about the OCP in the EN5322QI datasheet.

"Current Limit Threshold" is listed as 2.1A(min), 3.0A(typ).
However, in the graph of "Output Over Load at 2A Load: VIN= 5V, VOUT= 1.2V" on P.10,
OCP appears to be activated when CH4:IINDUCTOR exceeds approximately 4A.
Is this difference because the sample IC in the graph has a "Current Limit Threshold" ≒ 4A, or is it because IINDUCTOR is 4A when "Current Limit Threshold" = 3.0A (typ)?

In fact, it has always been used with excessive inrush current.
By chance, the OCP was activated, and upon investigation, we discovered an overcurrent.
It is natural to design the IC to be 2.1A or less, but on average, are most of the ICs being shipped around 4A?
I tried several boards, but I felt that the OCP was likely to activate if the inrush current exceeded 4A on any of them.

best Regards
K.Suzuki

[KSuzuki]

Sorry for the continuous questions.

In order to confirm the OCP, I added a capacitor to the 3.3V external power supply and intentionally increased the inrush current to 7A, but the 3.3V OCP did not work on the board modified for current measurement.

The EN5322QI data sheet states that the OCP threshold is up to 3.0A (typ) and does not list the MAX value. Is 7A within the expected MAX value? Or is it because the current measurement point is not the inductor section? Does it look like a different value internally?